Weed brownies are the classic cannabis edible — fudgy, chocolatey, and infused with cannabutter. Done right, they're one of the most enjoyable ways to consume cannabis. This step-by-step brownie guide covers everything: cannabutter prep, the perfect brownie recipe, exact brownie dosage guide calculations, and how to avoid the most common mistakes.
What You Need
For the Cannabutter
- 5–10g dried cannabis flower (or 15–20g trim/shake)
- 1 cup (225g) unsalted butter 1 cup water
Brownie Batter (16 brownies)
- ½ cup (115g) cannabutter, room temperature
- 1 cup (200g) granulated sugar
- 2 large eggs 1 tsp vanilla extract
- ⅓ cup (35g) unsweetened cocoa powder
- ½ cup (65g) all-purpose flour
- ¼ tsp each: salt, baking powder
- Optional: ½ cup chocolate chips

Step 1: Decarboxylate Your Cannabis
The step most beginners skip — and why their brownies don't work. Raw cannabis contains inactive THCA, not THC.
- Preheat oven to 230°F / 110°C (convection preferred)
- Break cannabis into pea-sized pieces on parchment-lined baking sheet
- Bake 40–45 minutes, turning once halfway. Done when golden-brown and herbal-smelling.
- Cool completely before proceeding
Step 2: Make Cannabutter
- Melt butter in pot over very low heat. Add water.
- Add decarboxylate your cannabised cannabis, stir to combine
- Maintain 160–180°F / 70–80°C — do NOT boil
- Simmer 2–3 hours, stirring every 30 min
- Strain through cheesecloth. Squeeze out every drop.
- Refrigerate until solid. Pour off water layer.
Step 3: Make the Brownies
- Preheat oven to 325°F / 165°C. Line 8×8 inch pan with parchment.
- Melt cannabutter. Whisk in sugar.
- Beat in eggs one at a time, then vanilla.
- Sift in cocoa, flour, salt, baking powder. Fold gently — don't overmix.
- Fold in chocolate chips if using.
- Pour into pan. Bake 25–30 minutes until toothpick 1 inch from edge has moist crumbs.
- Cool completely before cutting.

Dosage Calculation
Example: 7g at 18% THC, 16 brownies
- 7 × 1,000 × 0.18 = 1,260mg THCA
- After decarb (90%): ~1,134mg THC
- After infusion (65%): ~737mg in butter
- Recipe uses ½ of butter: ~369mg in brownies
- Per brownie: ~23mg THC
| THC per Brownie | Beginner Effect | Experienced Effect |
|---|---|---|
| 2–5mg | Mild relaxation | Barely noticeable |
| 5–10mg | Clear effects | Gentle relaxation |
| 10–20mg | Too strong for beginners | Good recreational dose |
| 20–50mg | Overwhelming | Strong recreational dose |
Golden rule: Start with ¼–½ brownie. Wait how long edibles last before eating more.

Dosing Tips
- Use a kitchen scale — weigh brownies to ensure equal portions
- Score the pan into 16 squares before baking as a cutting guide
- Mix thoroughly — cannabutter must be fully incorporated
- Label clearly and store separately from regular brownies
Variations
- Fudgier: Replace ¼ cup flour with extra cocoa add 2 tbsp melted dark chocolate
- Vegan: Cannabis coconut oil instead of cannabutter flax eggs
- Low-dose: Halve the cannabis, make 24 pieces — aim for 5mg THC each
Storage
Airtight at room temperature: 4–5 days | Refrigerator: 2 weeks | Freezer: 3 months. Label with cannabis content and keep away from children.
Troubleshooting
Don't work: Did you decarb properly? 230°F for 40–45 min?
Too strong: Use less cannabis next time, cut smaller squares.
Cannabis taste: More cocoa and chocolate chips masks herbal flavor effectively.
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